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Acta Optica Sinica, Volume. 38, Issue 5, 0528004(2018)

High-Precision Pointing Technology with Reflected Point Light Source Based on CCD Camera

Hao Feng1,2、*, Liming Zhang1, Jiawei Li1, Weiwei Xu1, and Hongyao Chen1
Author Affiliations
  • 1 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
  • 2 University of Science and Technology of China, Hefei, Anhui 230026, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (6)
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    References (14)
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    Figures & Tables(6)
    High-precision point light source system. (a) Structural diagram; (b) physical map

    Fig. 1. High-precision point light source system. (a) Structural diagram; (b) physical map

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    Sun sensor

    Fig. 2. Sun sensor

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    Relationships among coordinate systems of point light source systems. (a) Relationship between camera coordinate system and reflector coordinate system; (b) relationship between camera coordinate system and pitch coordinate system; (c) relationship between pitch coordinate system and azimuth coordinate system; (d) relationship between azimuth coordinate system and local coordinate system

    Fig. 3. Relationships among coordinate systems of point light source systems. (a) Relationship between camera coordinate system and reflector coordinate system; (b) relationship between camera coordinate system and pitch coordinate system; (c) relationship between pitch coordinate system and azimuth coordinate system; (d) relationship between azimuth coordinate system and local coordinate system

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    Flow chart of algorithm

    Fig. 4. Flow chart of algorithm

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    • Table 1. Partial test data of No.1 machine

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      Table 1. Partial test data of No.1 machine

      Elevating angle of the sun /(°)Azimuth angle of the sun /(°)Pixel Xof the sun /pixelPixel Yof the sun /pixelMeasured pitch angle /(°)Measured azimuth angle /(°)Calculated pitch angle /(°)Calculated azimuth angle /(°)Pitch angle error /(°)Azimuth angle error /(°)
      50.7564122.8093966758750.4848122.34350.4616122.2870.023210.05600
      51.4766124.0611939187745.3212113.49945.2959113.5280.02529-0.02870
      51.5697124.2268439686645.6013113.80645.6148113.850-0.01340-0.04360
      51.6325124.3392439985046.0078113.99346.0209114.055-0.01300-0.06170
      51.6926124.4470241082946.4912114.49946.5077114.545-0.01640-0.04620
      51.7471124.5452142180747.0076115.00947.0130115.029-0.00530-0.01930
      51.8124124.6633342478747.5075115.20747.5127115.243-0.00510-0.03590
      51.8722124.7718743077647.7931115.50947.7979115.558-0.00470-0.04860
      51.9509124.9153544076948.0074116.00948.0012116.0500.00618-0.04050
      ︙︙︙︙︙︙︙︙︙︙
      56.5255134.7882266148558.5050134.00558.4944134.0420.01059-0.03710
      56.5770134.9217366946459.0049134.50059.0119134.513-0.00700-0.01380

    • Table 2. Test results of three instruments

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      Table 2. Test results of three instruments

      ParameterMachine 1Machine 2Machine 3
      Standard deviation of pitch angle /(°)0.0125210.0102860.014841
      Standard deviation of azimuth angle /(°)0.0412880.0325040.035445
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    Hao Feng, Liming Zhang, Jiawei Li, Weiwei Xu, Hongyao Chen. High-Precision Pointing Technology with Reflected Point Light Source Based on CCD Camera[J]. Acta Optica Sinica, 2018, 38(5): 0528004

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Nov. 28, 2017

    Accepted: --

    Published Online: Jul. 10, 2018

    The Author Email: Feng Hao (fakhri@mail.ust)

    DOI:10.3788/AOS201838.0528004

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology